#[non_exhaustive]pub enum DolbyVisionProfile {
Profile5,
Profile81,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DolbyVisionProfile
, it is important to ensure
your code is forward-compatible. That is, if a match arm handles a case for a
feature that is supported by the service but has not been represented as an enum
variant in a current version of SDK, your code should continue to work when you
upgrade SDK to a future version in which the enum does include a variant for that
feature.
Here is an example of how you can make a match expression forward-compatible:
# let dolbyvisionprofile = unimplemented!();
match dolbyvisionprofile {
DolbyVisionProfile::Profile5 => { /* ... */ },
DolbyVisionProfile::Profile81 => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when dolbyvisionprofile
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DolbyVisionProfile::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DolbyVisionProfile::Unknown(UnknownVariantValue("NewFeature".to_owned()))
and calling as_str
on it yields "NewFeature"
.
This match expression is forward-compatible when executed with a newer
version of SDK where the variant DolbyVisionProfile::NewFeature
is defined.
Specifically, when dolbyvisionprofile
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DolbyVisionProfile::NewFeature
also yielding "NewFeature"
.
Explicitly matching on the Unknown
variant should
be avoided for two reasons:
- The inner data
UnknownVariantValue
is opaque, and no further information can be extracted. - It might inadvertently shadow other intended match arms. Required when you enable Dolby Vision. Use Profile 5 to include frame-interleaved Dolby Vision metadata in your output. Your input must include Dolby Vision metadata or an HDR10 YUV color space. Use Profile 8.1 to include frame-interleaved Dolby Vision metadata and HDR10 metadata in your output. Your input must include Dolby Vision metadata.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Profile5
Profile81
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl DolbyVisionProfile
impl DolbyVisionProfile
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for DolbyVisionProfile
impl AsRef<str> for DolbyVisionProfile
source§impl Clone for DolbyVisionProfile
impl Clone for DolbyVisionProfile
source§fn clone(&self) -> DolbyVisionProfile
fn clone(&self) -> DolbyVisionProfile
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DolbyVisionProfile
impl Debug for DolbyVisionProfile
source§impl Display for DolbyVisionProfile
impl Display for DolbyVisionProfile
source§impl From<&str> for DolbyVisionProfile
impl From<&str> for DolbyVisionProfile
source§impl FromStr for DolbyVisionProfile
impl FromStr for DolbyVisionProfile
source§impl Hash for DolbyVisionProfile
impl Hash for DolbyVisionProfile
source§impl Ord for DolbyVisionProfile
impl Ord for DolbyVisionProfile
source§fn cmp(&self, other: &DolbyVisionProfile) -> Ordering
fn cmp(&self, other: &DolbyVisionProfile) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for DolbyVisionProfile
impl PartialEq for DolbyVisionProfile
source§fn eq(&self, other: &DolbyVisionProfile) -> bool
fn eq(&self, other: &DolbyVisionProfile) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DolbyVisionProfile
impl PartialOrd for DolbyVisionProfile
source§fn partial_cmp(&self, other: &DolbyVisionProfile) -> Option<Ordering>
fn partial_cmp(&self, other: &DolbyVisionProfile) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for DolbyVisionProfile
impl StructuralPartialEq for DolbyVisionProfile
Auto Trait Implementations§
impl Freeze for DolbyVisionProfile
impl RefUnwindSafe for DolbyVisionProfile
impl Send for DolbyVisionProfile
impl Sync for DolbyVisionProfile
impl Unpin for DolbyVisionProfile
impl UnwindSafe for DolbyVisionProfile
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more